what are you trying to achieve
Scan a PHP project (has PHP, CSS, and JS) that up until recently had been working

what have you tried so far to achieve this
Running the same build script I always have, which calls /opt/sonar-scanner/bin/sonar-scanner. Re-ran the scanner with debug and captured the below excerpt

01:47:21.005 INFO: Load metrics repository (done) | time=26ms
01:47:21.042 INFO: Project key: HAWK
01:47:21.043 INFO: Project base dir: /var/jenkins_home/jobs/HAWK/workspace
01:47:21.047 INFO: Branch name: feature/SAS-340, type: short living
01:47:21.047 DEBUG: Start recursive analysis of project modules
01:47:21.048 INFO: ------------- Scan HAWK
01:47:21.096 DEBUG: Installed core extension: branch-scanner
01:47:21.286 INFO: Base dir: /var/jenkins_home/jobs/HAWK/workspace
01:47:21.286 INFO: Working dir: /var/jenkins_home/jobs/HAWK/workspace/.scannerwork
01:47:21.288 INFO: Source paths: .
01:47:21.288 INFO: Source encoding: UTF-8, default locale: en
01:47:21.291 INFO: SCM collecting changed files in the branch
01:47:21.310 DEBUG: readpipe [git, --version],/usr/bin
01:47:21.340 DEBUG: readpipe may return 'git version 2.11.0'
01:47:21.340 DEBUG: remaining output:
01:47:21.341 DEBUG: readpipe [git, config, --system, --edit],/usr/bin
01:47:21.348 DEBUG: readpipe may return '/etc/gitconfig'
01:47:21.348 DEBUG: remaining output:
01:47:21.481 INFO: ------------------------------------------------------------------------
01:47:21.481 INFO: EXECUTION FAILURE
01:47:21.481 INFO: ------------------------------------------------------------------------
01:47:21.481 INFO: Total time: 8.890s
01:47:21.539 INFO: Final Memory: 10M/158M
01:47:21.540 INFO: ------------------------------------------------------------------------
01:47:21.540 ERROR: Error during SonarQube Scanner execution
java.lang.IllegalStateException: Unable to load component class org.sonar.scanner.phases.AbstractPhaseExecutor
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:65)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:678)
at org.sonar.core.platform.ComponentContainer.getComponentByType(ComponentContainer.java:281)
at org.sonar.scanner.scan.ModuleScanContainer.doAfterStart(ModuleScanContainer.java:164)
at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:136)
at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:122)
at org.sonar.scanner.scan.ProjectScanContainer.scan(ProjectScanContainer.java:319)
at org.sonar.scanner.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:314)
at org.sonar.scanner.scan.ProjectScanContainer.doAfterStart(ProjectScanContainer.java:288)
at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:136)
at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:122)
at org.sonar.scanner.task.ScanTask.execute(ScanTask.java:48)
at org.sonar.scanner.task.TaskContainer.doAfterStart(TaskContainer.java:82)
at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:136)
at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:122)
at org.sonar.scanner.bootstrap.GlobalContainer.executeTask(GlobalContainer.java:131)
at org.sonar.batch.bootstrapper.Batch.doExecuteTask(Batch.java:116)
at org.sonar.batch.bootstrapper.Batch.execute(Batch.java:71)
at org.sonarsource.scanner.api.internal.batch.BatchIsolatedLauncher.execute(BatchIsolatedLauncher.java:46)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.sonarsource.scanner.api.internal.IsolatedLauncherProxy.invoke(IsolatedLauncherProxy.java:60)
at com.sun.proxy.$Proxy0.execute(Unknown Source)
at org.sonarsource.scanner.api.EmbeddedScanner.doExecute(EmbeddedScanner.java:171)
at org.sonarsource.scanner.api.EmbeddedScanner.execute(EmbeddedScanner.java:128)
at org.sonarsource.scanner.cli.Main.execute(Main.java:111)
at org.sonarsource.scanner.cli.Main.execute(Main.java:75)
at org.sonarsource.scanner.cli.Main.main(Main.java:61)
Caused by: java.lang.IllegalStateException: Unable to load component class org.sonar.scanner.phases.PostJobsExecutor
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:65)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:632)
at org.picocontainer.parameters.BasicComponentParameter$1.resolveInstance(BasicComponentParameter.java:118)
at org.picocontainer.parameters.ComponentParameter$1.resolveInstance(ComponentParameter.java:136)
at org.picocontainer.injectors.SingleMemberInjector.getParameter(SingleMemberInjector.java:78)
at org.picocontainer.injectors.ConstructorInjector$CtorAndAdapters.getParameterArguments(ConstructorInjector.java:309)
at org.picocontainer.injectors.ConstructorInjector$1.run(ConstructorInjector.java:335)
at org.picocontainer.injectors.AbstractInjector$ThreadLocalCyclicDependencyGuard.observe(AbstractInjector.java:270)
at org.picocontainer.injectors.ConstructorInjector.getComponentInstance(ConstructorInjector.java:364)
at org.picocontainer.injectors.AbstractInjectionFactory$LifecycleAdapter.getComponentInstance(AbstractInjectionFactory.java:56)
at org.picocontainer.behaviors.AbstractBehavior.getComponentInstance(AbstractBehavior.java:64)
at org.picocontainer.behaviors.Stored.getComponentInstance(Stored.java:91)
at org.picocontainer.DefaultPicoContainer.getInstance(DefaultPicoContainer.java:699)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:647)
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:63)
... 29 more
Caused by: java.lang.IllegalStateException: Unable to load component class org.sonar.scanner.bootstrap.ScannerExtensionDictionnary
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:65)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:632)
at org.picocontainer.parameters.BasicComponentParameter$1.resolveInstance(BasicComponentParameter.java:118)
at org.picocontainer.parameters.ComponentParameter$1.resolveInstance(ComponentParameter.java:136)
at org.picocontainer.injectors.SingleMemberInjector.getParameter(SingleMemberInjector.java:78)
at org.picocontainer.injectors.ConstructorInjector$CtorAndAdapters.getParameterArguments(ConstructorInjector.java:309)
at org.picocontainer.injectors.ConstructorInjector$1.run(ConstructorInjector.java:335)
at org.picocontainer.injectors.AbstractInjector$ThreadLocalCyclicDependencyGuard.observe(AbstractInjector.java:270)
at org.picocontainer.injectors.ConstructorInjector.getComponentInstance(ConstructorInjector.java:364)
at org.picocontainer.injectors.AbstractInjectionFactory$LifecycleAdapter.getComponentInstance(AbstractInjectionFactory.java:56)
at org.picocontainer.behaviors.AbstractBehavior.getComponentInstance(AbstractBehavior.java:64)
at org.picocontainer.behaviors.Stored.getComponentInstance(Stored.java:91)
at org.picocontainer.DefaultPicoContainer.getInstance(DefaultPicoContainer.java:699)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:647)
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:63)
... 43 more
Caused by: java.lang.IllegalStateException: Unable to load component class org.sonar.scanner.sensor.DefaultSensorContext
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:65)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:632)
at org.picocontainer.parameters.BasicComponentParameter$1.resolveInstance(BasicComponentParameter.java:118)
at org.picocontainer.parameters.ComponentParameter$1.resolveInstance(ComponentParameter.java:136)
at org.picocontainer.injectors.SingleMemberInjector.getParameter(SingleMemberInjector.java:78)
at org.picocontainer.injectors.ConstructorInjector$CtorAndAdapters.getParameterArguments(ConstructorInjector.java:309)
at org.picocontainer.injectors.ConstructorInjector$1.run(ConstructorInjector.java:335)
at org.picocontainer.injectors.AbstractInjector$ThreadLocalCyclicDependencyGuard.observe(AbstractInjector.java:270)
at org.picocontainer.injectors.ConstructorInjector.getComponentInstance(ConstructorInjector.java:364)
at org.picocontainer.injectors.AbstractInjectionFactory$LifecycleAdapter.getComponentInstance(AbstractInjectionFactory.java:56)
at org.picocontainer.behaviors.AbstractBehavior.getComponentInstance(AbstractBehavior.java:64)
at org.picocontainer.behaviors.Stored.getComponentInstance(Stored.java:91)
at org.picocontainer.DefaultPicoContainer.getInstance(DefaultPicoContainer.java:699)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:647)
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:63)
... 57 more
Caused by: java.lang.IllegalStateException: Unable to load component class org.sonar.scanner.scan.filesystem.DefaultModuleFileSystem
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:65)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:632)
at org.picocontainer.parameters.BasicComponentParameter$1.resolveInstance(BasicComponentParameter.java:118)
at org.picocontainer.parameters.ComponentParameter$1.resolveInstance(ComponentParameter.java:136)
at org.picocontainer.injectors.SingleMemberInjector.getParameter(SingleMemberInjector.java:78)
at org.picocontainer.injectors.ConstructorInjector$CtorAndAdapters.getParameterArguments(ConstructorInjector.java:309)
at org.picocontainer.injectors.ConstructorInjector$1.run(ConstructorInjector.java:335)
at org.picocontainer.injectors.AbstractInjector$ThreadLocalCyclicDependencyGuard.observe(AbstractInjector.java:270)
at org.picocontainer.injectors.ConstructorInjector.getComponentInstance(ConstructorInjector.java:364)
at org.picocontainer.injectors.AbstractInjectionFactory$LifecycleAdapter.getComponentInstance(AbstractInjectionFactory.java:56)
at org.picocontainer.behaviors.AbstractBehavior.getComponentInstance(AbstractBehavior.java:64)
at org.picocontainer.behaviors.Stored.getComponentInstance(Stored.java:91)
at org.picocontainer.DefaultPicoContainer.getInstance(DefaultPicoContainer.java:699)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:647)
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:63)
... 71 more
Caused by: java.lang.IllegalStateException: Unable to load component class org.sonar.scanner.scan.filesystem.StatusDetection
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:65)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:632)
at org.picocontainer.parameters.BasicComponentParameter$1.resolveInstance(BasicComponentParameter.java:118)
at org.picocontainer.parameters.ComponentParameter$1.resolveInstance(ComponentParameter.java:136)
at org.picocontainer.injectors.SingleMemberInjector.getParameter(SingleMemberInjector.java:78)
at org.picocontainer.injectors.ConstructorInjector$CtorAndAdapters.getParameterArguments(ConstructorInjector.java:309)
at org.picocontainer.injectors.ConstructorInjector$1.run(ConstructorInjector.java:335)
at org.picocontainer.injectors.AbstractInjector$ThreadLocalCyclicDependencyGuard.observe(AbstractInjector.java:270)
at org.picocontainer.injectors.ConstructorInjector.getComponentInstance(ConstructorInjector.java:364)
at org.picocontainer.injectors.AbstractInjectionFactory$LifecycleAdapter.getComponentInstance(AbstractInjectionFactory.java:56)
at org.picocontainer.behaviors.AbstractBehavior.getComponentInstance(AbstractBehavior.java:64)
at org.picocontainer.behaviors.Stored.getComponentInstance(Stored.java:91)
at org.picocontainer.DefaultPicoContainer.getInstance(DefaultPicoContainer.java:699)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:647)
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:63)
... 85 more
Caused by: java.lang.IllegalStateException: Unable to load component class org.sonar.scanner.scan.filesystem.StatusDetection
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:65)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:621)
at org.picocontainer.containers.ImmutablePicoContainer.getComponent(ImmutablePicoContainer.java:40)
at org.picocontainer.DefaultPicoContainer.getInstance(DefaultPicoContainer.java:718)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:647)
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:63)
... 99 more
Caused by: java.lang.IllegalStateException: Unable to load component class org.sonar.scanner.scm.ScmChangedFiles
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:65)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:632)
at org.picocontainer.parameters.BasicComponentParameter$1.resolveInstance(BasicComponentParameter.java:118)
at org.picocontainer.parameters.ComponentParameter$1.resolveInstance(ComponentParameter.java:136)
at org.picocontainer.injectors.SingleMemberInjector.getParameter(SingleMemberInjector.java:78)
at org.picocontainer.injectors.ConstructorInjector$CtorAndAdapters.getParameterArguments(ConstructorInjector.java:309)
at org.picocontainer.injectors.ConstructorInjector$1.run(ConstructorInjector.java:335)
at org.picocontainer.injectors.AbstractInjector$ThreadLocalCyclicDependencyGuard.observe(AbstractInjector.java:270)
at org.picocontainer.injectors.ConstructorInjector.getComponentInstance(ConstructorInjector.java:364)
at org.picocontainer.injectors.AbstractInjectionFactory$LifecycleAdapter.getComponentInstance(AbstractInjectionFactory.java:56)
at org.picocontainer.behaviors.AbstractBehavior.getComponentInstance(AbstractBehavior.java:64)
at org.picocontainer.behaviors.Stored.getComponentInstance(Stored.java:91)
at org.picocontainer.DefaultPicoContainer.getInstance(DefaultPicoContainer.java:699)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:647)
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:63)
... 104 more
Caused by: java.lang.NullPointerException
at org.eclipse.jgit.lib.ObjectIdOwnerMap.get(ObjectIdOwnerMap.java:138)
at org.eclipse.jgit.revwalk.RevWalk.parseAny(RevWalk.java:888)
at org.eclipse.jgit.revwalk.RevWalk.parseCommit(RevWalk.java:800)
at org.sonarsource.scm.git.GitScmProviderBefore77.prepareTreeParser(GitScmProviderBefore77.java:196)
at org.sonarsource.scm.git.GitScmProviderBefore77.branchChangedFiles(GitScmProviderBefore77.java:90)
at org.sonar.scanner.scm.ScmChangedFilesProvider.loadChangedFilesIfNeeded(ScmChangedFilesProvider.java:70)
at org.sonar.scanner.scm.ScmChangedFilesProvider.provide(ScmChangedFilesProvider.java:50)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.picocontainer.injectors.MethodInjector.invokeMethod(MethodInjector.java:129)
at org.picocontainer.injectors.MethodInjector.access$000(MethodInjector.java:39)
at org.picocontainer.injectors.MethodInjector$2.run(MethodInjector.java:113)
at org.picocontainer.injectors.AbstractInjector$ThreadLocalCyclicDependencyGuard.observe(AbstractInjector.java:270)
at org.picocontainer.injectors.MethodInjector.decorateComponentInstance(MethodInjector.java:120)
at org.picocontainer.injectors.CompositeInjector.decorateComponentInstance(CompositeInjector.java:58)
at org.picocontainer.injectors.Reinjector.reinject(Reinjector.java:142)
at org.picocontainer.injectors.ProviderAdapter.getComponentInstance(ProviderAdapter.java:96)
at org.picocontainer.DefaultPicoContainer.getInstance(DefaultPicoContainer.java:699)
at org.picocontainer.DefaultPicoContainer.getComponent(DefaultPicoContainer.java:647)
at org.sonar.core.platform.ComponentContainer$ExtendedDefaultPicoContainer.getComponent(ComponentContainer.java:63)
... 118 more